Propagation
Dräger PSS
®
Merlin
®
45
The following illustrations show two possible system layouts. For clarity the coaxial cable is shown coiled on the winding reels
but for operation the cable would be fully unwound from the reel.
Refer to the Instructions for Use provided with the Repeaters and Leaky Feeders for full details.
E.3 Customer Evaluation Trials
It is important to be aware that radio communication can be affected by a breakdown in the transmission signal due to extremes
of application such as long distances, building construction, below ground structures, etc. The chapters on propagation,
Repeaters and Leaky Feeders are intended to provide the user with a basic understanding of the factors that may affect the
Dräger PSS
®
Merlin
®
Telemetry System modules in a working environment at an incident.
To further the user’s understanding of the issues and the techniques that can be employed to enhance communication, Dräger
recommend that users familiarise themselves fully with the issues covered in the preceding chapters, and follow up by performing
their own evaluation training trials in simulated known hazard scenarios.
A Customer Evaluation Guideline booklet is available from Dräger on request.
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Single Repeater
Two Repeaters
2853
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